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Numerical Study on Wind Resources and Forecast Around Coastal Area Applying Inhomogeneous Data to Variational Data Assimilation
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 Title & Authors
Numerical Study on Wind Resources and Forecast Around Coastal Area Applying Inhomogeneous Data to Variational Data Assimilation
Park, Soon-Young; Lee, Hwa-Woon; Kim, Dong-Hyeok; Lee, Soon-Hwan;
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Wind power energy is one of the favorable and fast growing renewable energies. It is most important for exact analysis of wind to evaluate and forecast the wind power energy. The purpose of this study is to improve the performance of numerical atmospheric model by data assimilation over a complex coastal area. The benefit of the profiler is its high temporal resolution and dense observation data at the lower troposphere. Three wind profiler sites used in this study are inhomogeneously situated near south-western coastal area of Korean Peninsula. The method of the data assimilation for using the profiler to the model simulation is the three-dimensional variational data assimilation (3DVAR). The experiment of two cases, with/without assimilation, were conducted for how to effect on model results with wind profiler data. It was found that the assimilated case shows the more reasonable results than the other case compared with vertical observation and surface Automatic Weather Station(AWS) data. Although the effect of sonde data was better than profiler at a higher altitude, the profiler data improves the model performance at lower atmosphere. Comparison with the results of 4 June and 5 June suggests that the efficiency with hourly assimilated profiler data is strongly influenced by synoptic conditions. The reduction rate of Normalized Mean Error(NME), mean bias normalized by averaged wind speed of observation, on 4 June was 28% which was larger than 13% of 5 June. In order to examine the difference in wind power energy, the wind power density(WPD) was calculated and compared.
Wind power;Wind profiler;Variational data assimilation;
 Cited by
한반도 풍력자원지도 - 2010년판,김현구;강용혁;

한국풍공학회지, 2012. vol.16. 4, pp.167-172
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